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R30006 Cobalt vs. EN 1.3551 Steel

R30006 cobalt belongs to the cobalt alloys classification, while EN 1.3551 steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is EN 1.3551 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 85
75
Tensile Strength: Ultimate (UTS), MPa 900
720

Thermal Properties

Latent Heat of Fusion, J/g 320
260
Melting Completion (Liquidus), °C 1400
1490
Melting Onset (Solidus), °C 1290
1450
Specific Heat Capacity, J/kg-K 450
460
Thermal Conductivity, W/m-K 15
36
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
8.6
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
9.9

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.9
Embodied Carbon, kg CO2/kg material 7.8
4.9
Embodied Energy, MJ/kg 110
71
Embodied Water, L/kg 500
82

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 29
26
Strength to Weight: Bending, points 24
23
Thermal Diffusivity, mm2/s 3.9
9.8
Thermal Shock Resistance, points 26
21

Alloy Composition

Carbon (C), % 0.9 to 1.4
0.77 to 0.85
Chromium (Cr), % 27 to 32
3.9 to 4.3
Cobalt (Co), % 48.6 to 68.1
0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 0 to 3.0
88.8 to 91.1
Manganese (Mn), % 0
0.15 to 0.35
Molybdenum (Mo), % 0 to 1.0
4.0 to 4.5
Nickel (Ni), % 0 to 3.0
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 2.0
0 to 0.4
Sulfur (S), % 0
0 to 0.015
Tungsten (W), % 4.0 to 6.0
0 to 0.25
Vanadium (V), % 0
0.9 to 1.1